Pump lining



June 16, 1925.

L. P. BURGESS PUMP LINING Filed Sept. 2, 1924 Ema/afar. lys/ePfiayess Patented June 16, 1925. V

UNITED STATES LYSLE P. BURGESS, DE LOS ANGELES, CALIFORNIA.

PUMP LININ G.

Application filed September 2, 1924. Serial No. 735,300.

To all whom it may concern:

Be it known that I, LYSLE P. Bunoms, a citizen of the United States, residing in Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Pump Linings, of which the following is a detailed specification.

This invention has-t0 do with pump liners such as the tubular sections used for lining working barrels or pumps. It is more particularly concerned with the formation of the ends of adjacent liner sections whereby they may be pressed into substantially fluid tight engagement without disturbing the concentricity of their alinement and without destroying the uniformity of bore diameter throughout the length of the complete liner.

Working barrel liners are made up of tublflar sections arranged in end to end relation and annularly spaced from an enclosing casing. Their bores are ground to size with very little tolerance, and it is of course necessary that the bores of the several sections be in accurate concentric alinement. They are ordinarily brought into such alinement by use of a removal mandrel, the sections then being clampedby pressure exerted against opposite ends of the liner by collars threadably connected to the casing.

It .has been found that when the force of this end pressure is sufficient to make a proper joint (that is, one which is practi- A cally fluid tight and which will prevent lateral shifting of the sections after the mandrel is removed) the sections become swedged or spread into the bore at the joints; the resulting swells or variances from the prescribed diameter of the bore preventing smooth lunger action and being generally harm l to the pump, as will be well understood by those skilled in the art.

To overcome this condition, it has been found helpful to relieve or incline the end faces of the sections by beveling them from the exterior peripheral faces of the sections to the internal peripheral faces thereof, so the end faces of adjacent sections will contact only at their outer peripheral edges. However, to provide for the full annular engagement of these edges, it is absolutely essential that the outer peripheral faces and bores of each section be in absolute concentricity, a requirement which calls for a degree of accuracy not warranted from an economic standpoint, and most diflicult of accomplishment by ordinary manufacturing methods.

There have also been provided interfitting annular recesses and tongues on opposed ends of adjacent sections for maintaining them in alinement, but this construction also calls for absolute conoentricity of the liner bores and tongue shoulders, which is objectionable for the reasons set forth above.

I have devised an end formation for the sections which requires comparatively little accuracy in machining, and yet has all the advantages and none of the disadvantages outlined above. It calls for no accurately interfitting parts and may be manufactured with comparative speed and cheapness.

In my improved liner, one end of a given section is beveled off on the outside to provide an annular bearing edge (in some cases an annular ridge of angular cross-section) this edge being sufficiently spaced from the outer peripheral face of the sections to insure full engagement between it and the flat end face of the adjacent section. Then, even though the outer peripheral faces of the sections or the annular edge be not precisely concentric with the bore, a full seat is assured', the sections 'being shifted laterally by the use of a removable mandrel until their bores are in exact alinement, and then pressed together so said annular edge makes its own seat on said flat end face.

The end faces of either or both sections are inclined rather than being at right angles, this provision being made to give vertical clearance extending laterally between the annular line of seat and the bore of the liner, so when end pressure is exerted on the liner, said sections will not bulge inwardly at the joints.

A better understanding of the invention will be hadfrom a consideration of the following description, reference being had to the accompanying drawings, in which:

Fig. 1 is a longitudinal medial section through the upper end of the working barrel of a pump in which my improved liner sections have been installed;

F ig. l-is a contracted, sectional View of the lower end of such a working barrel, and may be considered a continuation of the lower end of Fig. 1;

Fig. 2 is an enlarged, sectional view show ing the end formation of the liner sections;

Fig. 3 shows a variational end formation;

Fig. 4 illustrates another variational end formation; and

Fig. 5 illustrates still another variational end formation.

In Figs. 1 and 1 I have shown a casing or shell 10 which carries upper and lower collars 11 and 12, respectively. A tubular liner 13, made up of any desired number of sections 14, 15, 16 and 17, is annularly spaced from shell 10, the sections being held in end engagement and against longitudinal movement between shoulders 18 on collars 11, 12. Plunger 19 is adapted to be reciprocated through liner 13, said plunger having the usual valve 20 and nipple 21, the latter carrying extension shoe 22 within which is mounted standin valve 23. A usual Garbut attachment provides for the insertion and removal of valve 23.

The several liner sections may be of identical construction, except that the upper end face of section 14 and the lower end face of section 17 are preferably squared to provide ample seating surface for shoulders 18, and have slightly flaring mouths leading gradually from the bores of the collars to the smaller bores of the sections.

For the purposes of description, let us assume Fig. 2 shows the joint between sections 14 and 15. The upper end face 24 of section 15 is flat, but it inclines inwardly and downwardly towards the section axis. The major portion 25 of the end faces 26 of section 14 inclines inwardly and upwardly towards the section axis, the outer peripheral edge of said end face 26 being beveled off at 27 to approximately meet incline 25. Thus there is formed an annular ridge 28, of angular cross-section, on the end of section 14, and by cutting this ridge so it is sufficiently spaced from the outer peripheral face of the section, it is assured that said ridge will have full engagement with flat face 24 even though the outer peripheral face of the sec tion or the annular ridge 28 be out of concentricity with liner bore B.

When the liner is installed, the several sections are shifted laterally (usually by an expansible and removable mandrel, not shown) until the section bores are in exact alinement. Then by threading collars 11, 12 on the casing, end pressure is brought to bear on the liner, causing ridges 28 to bite into and form their own seats on flat faces 24. The expansible mandrel may then be removed, and the engagement of rid e 28 (which may have varying degrees of s arpness or even have a slightly flattened or rounded engagement area, depending upon the demands of individual installation) with face 24, forms a substantially fluid tight joint between the sections and holds them from shifting out of vertical alinement. The relief previded by inclining faces 24 and 25 leaves vertical-clearance between the inner edges of the two sections, so said edges may not become pressed together in a manner to bul e the liner inwardly at the joint.

In the rawings, the inclination of faces 24 and 25 is greatly exaggerated for the purpose of clearly illustrating the general principles involved. I find that cutting them at a angle is suflicient to provide ample clearance. The angularity of these two end faces is so slight in actual practice that the two sections may be shifted slightly (laterally) with respect to each other and still a good seat can be maintained, since the ridge cuts its own seat in exactly the right position on the fiat face.

The same general conditions prevail when end face 24 is cut square, or when face 25 is cut square and face 24 cut with an incline. In Fig. 3, face 24, corresponding to face 24 in Fig. 2, is cut square, while end 26 of section 14 is out exactly as described in connection with Fig. 2. It will be seen that ridge 28 is adapted to engage face 24 and that the inclination of the latter face provides the relief or vertical clearance sought.

In 'Fig. 4, face 25 of section 14 is cut square, meetmg bevel 27 at edge 28. Since face 24 is inclined, edge 28 has the same effect as ridge 28, as far as the biting of said edgeinto face 24 is concerned, While the inclination of face 24 provides for the desired vertical clearance between the inner peripheral edges of sections 14 and 15.

In Figure 5 is shown a variational form of joint, which demonstrates that it is not necessary to the invention that bevel 27 start at the outer peripheral face of section 14 nor that inclined face 25 extend to the inner peripheral face of said section. In such a situation, flat face 24 of section 15 may be either inclined or square-cut, and portions or shoulders 30 and 31 of end face 26, which portions extend from opposite sides of the base of ridge 28 may be cut square or incline from the ridge base. It also lies within the scope of certain of my claims to so cut the end of section 14 that a shoulder similar to 30 be formed outside the bevels 27 of the variational joint formations shown in Figures 2, 3 and 4.

It will be understood the drawings and description are to be considered as merely illustrative of and not restrictive on the broader claims appended hereto, for there may be various changes in the device without departing from the spirit and scope of said claims.

Having described a preferred form of my invention, I claim:

1. A liner for pump barrels comprising a plurality of tubular sections arranged in end to end relation, one of the sections having a flat end face, the opposing end of the adjacent section being beveled from the outer peripheral face 0 said adjacent section towards the end face thereof, the bevel and last named end face meeting to form an angular, annular edge, said edge being sufficiently spaced from the outer perlpheral face of the liner to insure its complete seating on said flat face.

2. A liner for pump barrels comprising a plurality of tubular sections arranged in end to end relation, one of the sections having a flat end face the opposin end of the adjacent section being evele from the outer peripheral face of said adjacent section towards the end face thereof, the bevel and last mentioned end face meeting to form an annular edge, said edge being sufficiently spaced from the outer peripheral face of the liner to insure its complete seating on the said flat face, and the end face of one of the members soinclining that clearance exists between the opposin from said annular edge to the hner bore.

3. In a lungler working barrel, a casing, a liner wit 'n t e casing, said liner comprising a plurality of tubu ar sections arranged in end to end relation, one of the sections havin a flat end face, the opposin end of the a jacent section being beveled m the outer peripheral face of said adjacent section towards the end face thereof, the bevel and last mentioned end face meeting to form an annular edge, said edge being sufliciently spaced from the outer peripheral face of the liner to insure its complete seating on the said flat face, and the end face of one of the members so inclining that clearance exists between the opposing end faces from said end faces plurality of tubular sections arranged in end to end relation, the opposed ends of adjacent sections bemg so cut that there is a SID- gle annular line of contact between them, said line of contact occurring at an appreciable, laterally measured distance from both inner and outer peripheral faces of the sections.

5. A liner for pump barrels comprising a plurality of tubular sections arranged in end to end relation one of the sections having a flat end face the opposing end of the adjacent section iiaving an annular ridge, angular in cross section, annularly s aced from the inner and outer peripheral aces of the section, said ridge being adapted to engage said flat face in a manner to provide a single, annular line of contact between said opposing faces.

6. A liner for ump barrels comprising a plurality of tubuiar sections arranged in end to end relation, one of the sections havin a flat end face, the opposing end of the a jacent section bein beveled from the outer peripheral face 0 said adjacent section towards the end face thereof, said last mentioned end facing inclining from the bore of the section to meet said bevel and to form therewith an angular ridge which is angular in cross-section.

7. A liner for ump barrels comprising a plurality of tub ar sections arranged in end relation, one of the sections havin an end provided with an annular ridge and the adjacent end of the adjacent section having an unrecessed surface on which said annular ridge is seated by endwise pressure exerted on the tubular sections.

In witness that I claim the fore oin I have hereunto subscribed my name this 2%th day of August, 1924.

. LYSLE P. BURGESS. 

